... Grit: P16-P400 Size: 100mm,115mm,125mm,150mm,180mm,230mm Fiber backing Grain Backing Diameter X Hole sizeGrit No. A.O ... of hole patterns.These discs are suitable for using on steel, stainless steel, metal, NF metals, wood, plastic, marble and castiron. Even ... should be kept in the package before operation.Application: Abrasive fiber discs for grinding welding, seams, removing rust, removing paint and ...